Subject:
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Re: Which glue?
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Newsgroups:
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lugnet.parts.mod
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Date:
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Fri, 9 Feb 2007 23:02:21 GMT
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Viewed:
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10822 times
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In lugnet.parts.mod, John Neal wrote:
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In lugnet.parts.mod, Rob Hendrix wrote:
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Has Super Glue been used very successfully keeping ABS parts bonded over
time?
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AFAIK. Have you heard otherwise? I thought Super Glue was in the same type
glue family as MEK.
JOHN
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No they are quite different.
MEK is not even a glue or epoxy at all.
It is rather a solvent that literally loosens the plastic molecules of the ABS,
and allows them to intertwine between bricks. Once it evaporates, the ABS
returns to a state almost the same as it’s original. MEK’d ABS is slightly more
brittle than the original casting.
I strongly recommend only professionals with adequate ventilation and handling
equipment use MEK with any regularity. It has some significant health concerns,
and is being phased out of use by the LEGO company. It has been restricted from
use in the European model shops for at least the past 5 years.
Most superglues I have used are CA or Cyanoacrylate based.
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Per Wikipedia:
Generally, cyanoacrylate is an acrylic resin which rapidly polymerises in >
the presence of water (specifically hydroxide ions), forming long, strong >
chains, joining the bonded surfaces together. Because the presence of >
moisture causes the glue to set, exposure to moisture in the air can cause a >
tube or bottle of glue to become unusable over time. To prevent an opened >
container of glue from setting before use, it must be stored in an airtight >
jar or bottle with a package of silica gel.
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Except for very large, weight-bearing models, I would recommend people use
SuperGlue over MEK. No need to expose yourself to the stuff unless it’s really
necessary for it to be VERY durable.
Aaron Sneary
Former Master Model Builder
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Message has 1 Reply:
 | | Re: Which glue?
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| (...) As Aaron States, the use of MEK was BANNED from the Lego modelshops back in 1998, and GBL was introduced. Many health issues were being presented and an article written in the LEGO REVIEW magazine, a corporate magazine spoke about the (...) (18 years ago, 4-Apr-07, to lugnet.parts.mod, FTX)
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Message is in Reply To:
| | Re: Which glue?
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| (...) AFAIK. Have you heard otherwise? I thought Super Glue was in the same type glue family as MEK. JOHN (18 years ago, 9-Feb-07, to lugnet.parts.mod, FTX)
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